<template>
  <!-- 筛选区 -->
  <div class="sub-filter">
    <!-- 1. 品牌 （固定的）-->
    <div class="item">
      <div class="head">品牌：</div>
      <div class="body">
        <!-- <a href="javascript:;">全部</a> -->
        <a
        :class="{ active: brand.selected }"
          @click="setBrand(brand)"
          href="javascript:;"
          v-for="brand in subCateData.brands"
          :key="brand.id"
          >{{ brand.name }}</a
        >
      </div>
    </div>

    <!-- 2. 分类商品规格属性 （不固定的，根据商品自身属性决定）-->
    <div class="item" v-for="prd in subCateData.saleProperties" :key="prd.id">
      <!-- 规格也叫商品属性 -->
      <div class="head">{{ prd.name }}:</div>
      <div class="body">
        <!-- <a href="javascript:;">全部</a> -->
         <a
           @click="setPrd(per, prd)"
          :class="{ active: per.selected }"
          href="javascript:;"
          v-for="per in prd.properties"
          :key="per.id"
          >{{ per.name }}</a
        >
      </div>
    </div>
  </div>
</template>
<script>
import { inject } from 'vue'
export default {
  name: 'SubFilter',
  setup () {
    // 接收父组件过滤条件数据
    const subCateData = inject('subCateData')
    // 接收过滤条件数据
    const filterParams = inject('filterParams')
    // 处理品牌点击选中
    const setBrand = (currBrand) => {
      /**
       * 1. 把之前的数据都改成未选中
       * 2. 把当前点击的改成选中
       */
      // 如果已经选中了，就return
      if (currBrand.selected) return
      console.log(subCateData, subCateData.value)
      subCateData.value.brands.forEach(item => {
        item.selected = false
      })
      // 存储当前点击的品牌
      filterParams.value.brandId = currBrand.id
      currBrand.selected = true
    }
    // 处理属性点击选中
    /**
     * currPer 当前点击的属性
     * currPers 当前点击所有属性的集合
     */
    const setPrd = (currPer, currPers) => {
      if (currPer.selected) return
      console.log(currPer, currPers)
      currPers.properties.forEach(item => {
        item.selected = false
      })
      currPer.selected = true
      // 存储当前点击的商品属性（单选）
      /**
       * 1. 不是全部的时候，新增条件
       * 2. 每个属性groupName下，只能选择一个条件（单选）
       */
      // 1. 排重
      const index = filterParams.value.attrs.findIndex(item => currPers.name === item.groupName)
      // debugger
      if (index > -1) {
        filterParams.value.attrs.splice(index, 1)
      }
      // 2. 新增
      if (currPer.id !== null) {
        filterParams.value.attrs.push({
          groupName: currPers.name, // 属性名
          propertyName: currPer.name // 属性名具体的值
        })
      }
    }
    return { subCateData, setBrand, setPrd }
  }
}
</script>
<style scoped lang='less'>
// 筛选区
.sub-filter {
  background: #fff;
  padding: 25px;
  .item {
    display: flex;
    padding: 10px 0;
    .head {
      width: 80px;
      color: #999;
    }
    .body {
      flex: 1;
      a {
        display: inline-block;
        margin-right: 36px;
        margin-bottom: 20px;
        transition: all 0.3s;
        border: 1px solid #eee;
        padding: 6px;
        &.active,
        &:hover {
          color: @xtxColor;
          border-color: @xtxColor;
        }
      }
    }
  }
}
</style>
